Optimal reduced-rank 3D STAP for joint hot and cold clutter mitigation

A novel signal processing strategy is presented which provides optimal signal-dependent rank reduction for the 3D STAP hot and cold clutter mitigation problem. Through the use of spatial (angle) and PRI temporal (Doppler) degrees-of-freedom, conventional 2D STAP can cancel both monostatic ("cold") clutter and direct path jamming. However, additional "fast-time" degrees of freedom (on the order of the reciprocal of the receiver bandwidth) are required to cancel so-called "hot" clutter formed by jammer terrain-scattered interference. A multistage decomposition of the 3D sidelobe canceler (Wiener filter) is introduced both to evaluate the theoretical performance limits of rank reduction and to demonstrate that a more compact compression of the interference is possible than that obtained by the principal-components method. A high-fidelity simulated data set, based on DTED measurements, is employed to illustrate the efficacy of the multistage Wiener filtering approach to 3D STAP.

[1]  R. Kumaresan,et al.  Data adaptive signal estimation by singular value decomposition of a data matrix , 1982, Proceedings of the IEEE.

[2]  L. J. Griffiths,et al.  Performance bounds for interference mitigation in radar systems , 1999, Proceedings of the 1999 IEEE Radar Conference. Radar into the Next Millennium (Cat. No.99CH36249).

[3]  G. G. Stokes.  "J." , 1890, The New Yale Book of Quotations.

[4]  L.E. Brennan,et al.  Theory of Adaptive Radar , 1973, IEEE Transactions on Aerospace and Electronic Systems.

[5]  Alexander M. Haimovich,et al.  An eigenanalysis interference canceler , 1991, IEEE Trans. Signal Process..

[6]  James Ward,et al.  Space-time adaptive processing for airborne radar , 1998 .

[7]  I. S. Reed,et al.  A multistage STAP CFAR detection technique , 1998, Proceedings of the 1998 IEEE Radar Conference, RADARCON'98. Challenges in Radar Systems and Solutions (Cat. No.98CH36197).

[8]  R. L. Fante.  Cancellation of specular and diffuse jammer multipath using a hybrid adaptive array , 1991 .

[9]  J. S. Goldstein,et al.  Multistage partially adaptive STAP CFAR detection algorithm , 1999 .

[10]  Louis L. Scharf,et al.  A Multistage Representation of the Wiener Filter Based on Orthogonal Projections , 1998, IEEE Trans. Inf. Theory.